CN108359815A - A kind of preparation method containing vanadium solution - Google Patents
A kind of preparation method containing vanadium solution Download PDFInfo
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- CN108359815A CN108359815A CN201710282035.2A CN201710282035A CN108359815A CN 108359815 A CN108359815 A CN 108359815A CN 201710282035 A CN201710282035 A CN 201710282035A CN 108359815 A CN108359815 A CN 108359815A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/22—Obtaining vanadium
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/68—Aluminium compounds containing sulfur
- C01F7/74—Sulfates
- C01F7/76—Double salts, i.e. compounds containing, besides aluminium and sulfate ions, only other cations, e.g. alums
- C01F7/762—Ammonium or alkali metal aluminium sulfates
- C01F7/765—Ammonium aluminium sulfates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G31/00—Compounds of vanadium
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G31/00—Compounds of vanadium
- C01G31/02—Oxides
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/138—Waste materials; Refuse; Residues from metallurgical processes, e.g. slag, furnace dust, galvanic waste
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The present invention provides a kind of preparation methods containing vanadium solution, include the following steps：Vanadium leachate will be contained and remove silicon dealuminzation, obtain containing vanadium solution and remove silicon waste residue；It will be leached using the concentrated sulfuric acid except silicon waste residue, and obtain pickle liquor；By the pickle liquor after secondary filter, white residue and aluminum sulfate solution are obtained；The aluminum sulfate solution is mixed, crystallisation by cooling again after reaction with ammonium sulfate, is separated by solid-liquid separation through second and obtains ammonium aluminum sulfate crystal and crystalline mother solution, the crystalline mother solution is mixed with containing vanadium and chromium silicon solution to remove silicon for substituting part or all of aluminium salt.The method can will remove silicon waste residue resource and utilize, the higher alum product of added value is obtained, while the consumption of aluminium salt can be reduced, continuously and stably prepares high-purity ammonium metavanadate, it is not less than 99.9% high purity vanadic anhydride product to prepare purity, and improves the rate of recovery of vanadium；Simple process and low cost, energy consumption are few.
Description
Technical field
The invention belongs to Chemical Engineering Technologies and waste resource utilization technology field, are related to a kind of preparation side containing vanadium solution
Method more particularly to a kind of method of comprehensive utilization for removing silicon waste residue containing vanadium leachate.
Background technology
Vanadium slag be by contain the ores such as vanadium titano-magnetite pass through ore dressing, ironmaking, blow made from slag, in vanadium slag, vanadium mainly with
The form of vanadium iron spinelle exists.Vanadium slag is levigate and choosing remove the metallic iron of entrained with after, be incorporated sodium salt appropriate (sodium carbonate, sulphur
Sour sodium etc.) additive, by (830 DEG C ± 70 DEG C) roastings of high temperature, the insoluble vfanadium compound such as vanadium iron spinelle is oxidized to five oxygen
Change two vanadium, and reacted immediately with sodium salt, generate soluble sodium metavanadate, sodium metavanadate leaching is made with water and contains vanadium leachate.
Contain Cr containing vanadium leachate：1-2g/L, Si：0.6-0.9g/L, Ca:0.05~0.08g/L, Mg：The kinds such as 0.003~0.006g/L
Impurity, the industrial ammonium metavanadate of preparation can be added ammonium sulfate directly in leachate and be crystallized.But preparing high-purity ammonium metavanadate needs
The impurity such as Cr, Si, P, Ca, Mg in vanadium leachate are removed and be crystallized again.
There are vanadium (5~15%) and chromium (2~5%) to be total to association situation in vanadium slag, and vanadium chromium property is close, vanadium and chromium in product
Mutually doping, vanadium chromium efficiently separate the technical barrier during always vanadium chromium resource utilizes.
CN 103937998A study vanadium slag chemical composition and its existence form in detail, and to the same poly- of the vanadium of aqueous solution containing vanadium
State and hybrid polymer state and its existing dominant area are studied, and by quantum chemistry calculation, research and develop suitable work
Industry application, more stable primary amine (LK-N21) (primene JM-T (LK-N21, the direct-connected or branch that carbon molecules number is 14~24,
Relative molecular mass is 300~400) extractant carries out the separation of vanadium and chromium and impurity, and it bears vanadium organic phase and uses 5% ammonium hydroxide anti-
Extraction and crystallization obtain high-purity ammonium metavanadate, and the extractant is applied to production, realize continuous and steady operation；
The silicon dioxide gel of half flocculence is aggregated into containing the silicon in vanadium leachate, easily stable emulsion is used as to make extraction
Emulsification brings adverse effect to entire primary amine (LK-N21) extraction process, extends extraction time, loss of extractant is caused to increase,
It can lead to production disruption when serious, Si≤0.005g/L, Al≤0.005g/L in vanadium solution are required when primary amine extracts；
Make aluminium salt removing containing the silicon in vanadium leachate in production, additive amount is aluminium silicon mol ratio 0.8:1, but generate a large amount of
Silicon-aluminum containing vanadium waste residue (SiO2：35~41%, Al2O3:30~35%, V2O5:0.5~0.8%) a small amount of is removed into silicon in, now producing
It is roasted in waste residue incorporation vanadium slag, to extract except the vanadium in silicon waste residue prepares metallurgical grade vanadic anhydride.It is big except containing in silicon waste residue
The silicon of amount, vanadium slag sodium roasting generate soluble glass body sodium metasilicate, and hydrolysis precipitation colloidal silicon dioxide makes in leaching process
Leach filtration difficulty.Aluminium content also increases in leachate after roasting simultaneously, influences the recycling of precipitation.How effectively to recycle except silicon
Valuable element in waste residue realizes changing rejected material to useful resource and innoxious, process cleans metaplasia production and an important subject.
Invention content
In view of the deficiencies of the prior art, the present invention intends to provide a kind of preparation method containing vanadium solution, institute
The method of stating solves the problems, such as that, except silicon residue contamination environment, recycling can be carried out, and obtains the higher sulphur of added value
Sour aluminium ammonium product, while the consumption of aluminium salt can be reduced, it continuously and stably prepares high-purity and contains vanadium solution, it is high-purity to obtain
Ammonium metavanadate is spent, and then prepares purity and is not less than 99.9% high purity vanadic anhydride product, and improves the rate of recovery of vanadium, separately
Outside, the method simple process and low cost, energy consumption are few.
High-purity ammonium metavanadate of the present invention refers to that purity is not less than 99% ammonium metavanadate.
For this purpose, the present invention uses following technical scheme：
The present invention provides a kind of preparation methods containing vanadium solution, and described method includes following steps：
(1) aluminium salt is mixed with containing vanadium leachate to remove silicon, obtains removing silicon liquid, adjust the pH value except silicon liquid later to remove
The aluminium in silicon liquid is removed, is separated by solid-liquid separation, obtain containing vanadium solution and removes silicon waste residue；
(2) will be leached using the concentrated sulfuric acid except silicon waste residue, control leach terminate acid concentration be 2.5~3.8g/L, as 2.6g/L,
2.7g/L, 2.8g/L, 2.9g/L, 3.1g/L, 3.2g/L, 3.5g/L or 3.7g/L etc., after through first be separated by solid-liquid separation, obtain acid
Immersion liquid；By the pickle liquor after secondary filter, white residue and aluminum sulfate solution are obtained；The aluminum sulfate solution and ammonium sulfate is molten
Liquid mix, adjust mixed liquor pH value be 1~3 (such as pH be more than 3, have Al (OH)3Generate, influence the recycling of aluminium), such as 1.2,
1.5,1.8,2.0,2.3,2.5,2.8 or 2.9 etc., crystallisation by cooling again after reaction is separated by solid-liquid separation through second and obtains alum crystalline substance
Body and crystalline mother solution, the crystalline mother solution return to step (1) is for substituting the part or all of aluminium salt and containing vanadium and chromium silicon solution
Mixing is to remove silicon.
It is 2.5~3.8g/L that control, which leaches and terminates acid concentration, in preparation method provided by the invention containing vanadium solution, is had
Following advantage：Acid amount is accurately added while ensureing vanadium yield.
Method provided by the invention, will on the basis of existing containing vanadium and chromium silicon solution prepares the method for high-purity ammonium metavanadate
Except silicon waste residue is comprehensively utilized, the purity of high-purity ammonium metavanadate is not interfered with not only, additionally it is possible to co-producing sulfuric acid aluminium ammonium product, and
It can recycle except the vanadium in silicon waste residue, improve the rate of recovery of vanadium, obtained white residue can be used for preparing clay brick, and entire technique is pollution-free
Object discharge is cleaned nontoxic, has achieved the purpose that the recycling except silicon waste residue.
Step (1) and step (3) can refer to phase disclosed in CN 103937998A inside the Pass in method of the present invention
Hold, this will not be repeated here.
Step (1) described aluminium salt is selected from Al2(SO4)3、AlCl3Or NaAlO2In any one or at least two combination,
Typical but non-limiting combination such as Al2(SO4)3With AlCl3, Al2(SO4)3With NaAlO2, Al2(SO4)3、AlCl3With NaAlO2。
Preferably Al2(SO4)3。
Preferably, step (1) removes silicon under conditions of pH is 9~10, if pH is 9.1,9.2,9.3,9.4,9.5,9.7
Or 9.9 etc..
Step (1) is adjusted except the pH value of silicon liquid removes the aluminium impurity introduced in silicon liquid for 8.0~8.6 with removing, such as adjusts pH
Value is 8.1,8.2,8.3,8.4 or 8.5 etc..
Preferably, step (1) adjusts the pH except silicon liquid using sulfuric acid.
Step (1) the containing vanadium and chromium silicon solution is prepared through following method：By vanadium slag ball milling, sodium roasting is carried out after magnetic separation
It burns, then by product of roasting water logging, separation of solid and liquid obtains the containing vanadium and chromium silicon solution.
Step (2) concentrated sulfuric acid is 1~4 with the liquid-solid ratio except silicon waste residue:1, such as 1.5:1、2.0:1、2.5:1、2.8:
1、3.2:1、3.5:1 or 3.8:1 etc..Liquid-solid ratio has the following advantages that within this range：The aluminum ions concentration of solution is controlled 1.2
~1.3mol/L is reacted in this concentration with ammonium sulfate, and product is relatively low in concentration impurity ion.
Preferably, mass fraction >=92.5% of step (2) described sulfuric acid, such as 93%, 94%, 95%, 96%, 97% or
98% etc..
Preferably, the temperature of step (2) described leaching be 20~80 DEG C, such as 25 DEG C, 28 DEG C, 30 DEG C, 32 DEG C, 35 DEG C, 38
DEG C, 40 DEG C, 45 DEG C, 48 DEG C, 50 DEG C, 52 DEG C, 55 DEG C, 58 DEG C, 60 DEG C, 65 DEG C, 68 DEG C, 70 DEG C, 72 DEG C, 75 DEG C or 78 DEG C etc..
Preferably, the time of step (2) described leaching be 1~5h, as 1.2h, 1.5h, 1.8h, 2.3h, 2.5h, 3.0h,
3.5h, 3.8h, 4.3h or 4.8h etc..
Preferably, the mode that step (2) described first is separated by solid-liquid separation is filtered selected from filter press.
NH in step (2) described ammonium sulfate4 +With the Al in aluminum sulfate solution3+Molar ratio be 1.2~1.5:1,
Such as 1.3:1 or 1.4:1 etc..
Preferably, Al in step (2) described aluminum sulfate solution3+A concentration of 1.20~1.30mol/L, as 1.21mol/L,
1.22mol/L, 1.23mol/L, 1.25mol/L, 1.27mol/L or 1.29mol/L etc..
Preferably, a concentration of 330-430g/L of step (2) described ammonium sulfate, such as 335g/L, 340g/L, 345g/
L, 350g/L, 360g/L, 380g/L, 390g/L, 400g/L, 410g/L, 420g/L or 425g/L etc., pH≤2.5, as pH value is
2.3,2.1,2.0,1.9,1.5,1.3,1.0 or 0.5 etc., the ammonium sulfate prepared with this condition is liquid, can be conveyed.
Preferably, the temperature that step (2) described ammonium sulfate is reacted with aluminum sulfate solution is 30~70 DEG C, such as 32 DEG C,
35 DEG C, 38 DEG C, 40 DEG C, 45 DEG C, 48 DEG C, 50 DEG C, 52 DEG C, 55 DEG C, 58 DEG C, 60 DEG C, 65 DEG C or 68 DEG C etc..
Preferably, the temperature of step (2) described crystallisation by cooling be 0~20 DEG C, such as 2 DEG C, 5 DEG C, 8 DEG C, 10 DEG C, 12 DEG C, 13
DEG C, 15 DEG C, 18 DEG C or 19 DEG C etc..
The concentration and its pH of aluminum sulfate solution and ammonium sulfate are controlled, and controls the amount ratio and reaction of the two
Temperature has the following advantages that：The alum impurity content of crystallization is few, and low energy consumption.
Preferably, step (2) described secondary filter is enterprising in macromolecule PE microporous membrane filters and/or accurate filter
Row.Secondary filter is carried out again after first is separated by solid-liquid separation and is conducive to further filtering out for white residue, ensures the purity containing vanadium solution.
When step (2) crystalline mother solution containing vanadium leachate with removal silicon is mixed, aluminium in the crystalline mother solution with contain vanadium
The molar ratio of silicon in leachate is 0.8~1.2:1, such as 0.85:1、0.9:1、1.0:1 or 1.1:1 etc..It controls in crystalline mother solution
Aluminium had the following advantages that within this range with the molar ratio containing the silicon in vanadium leachate：It can ensure containing Si, Al in vanadium solution
≤ 0.005g/L.
Step (2) described alum is washed and is dried to obtain ammonia-alum product.
Preferably, the solution after the washing is mixed with the crystalline mother solution.
Step (2) will remove silicon waste residue using sulfuric acid and dissolve, and be obtained by filtration containing solution such as aluminium, vanadium, sodium；Again by this solution and sulphur
Monoaluminum monoammonium disulfate Dodecahydrate is washed and be dried to obtain to sour ammonium hybrid reaction through crystallisation by cooling, separation of solid and liquid,.12 hydrated sulfuric acids
Aluminium ammonium can be used as chemical products sale, and the mother liquor after crystallization contains a small amount of alum and vanadium, returns and leaches a small amount of sulphur of process
Sour aluminium ammonium can continue to remove silicon, while the also vanadium in recyclable crystalline mother solution, improve the rate of recovery of vanadium.It leaches filtered containing white residue
It can be used for making clay brick, realize the comprehensive utilization except silicon waste residue.
It is described except the comprehensive utilization principle of silicon waste residue is as follows：
Silicon waste residue is removed using sulfuric acid leaching, Al can be formed2(SO4)3With a small amount of Na2SO4Equal sulfate mixed liquor, Al2
(SO4)3Solubility it is high, be difficult to be directly separated from solution using traditional evaporating, concentrating and crystallizing, and NH4Al(SO4)2·12H2O
Solubility is small at low temperature, can preferentially be precipitated.It therefore, can be to containing Al2(SO4)3(NH is added in pickle liquor4)2SO4React (square
Formula (1)), generate the NH that precipitation is easily crystallized in low temperature4Al(SO4)2·12H2O, wherein (NH4)2SO4Preferably high-purity inclined vanadium
Obtained by sour crystalline ammonium upper liquid recycling ammonia nitrogen.NH4Al(SO4)2·12H2O is sold as chemical products, in order to ensure product matter
It measures, a small amount of Al is remained in crystalline mother solution3+, also V5+, crystalline mother solution can be returned to containing in vanadium leachate for roasted vanadic slag,
Use Al3+Continue to remove silicon (square formula (2)) pH=9~10, then the removings of pH=8.0~8.6 are adjusted containing residual in vanadium solution with sulfuric acid
The aluminium (square formula (3)) stayed can finally make containing Si≤0.005g/L, Al≤0.005g/L in vanadium solution.
Equation (1)~(3) are as follows：
Al2(SO4)3+(NH4)2SO4+24H2O=2NH4Al(SO4)2·12H2O
PH=1~2 (1)；
2NaAlO2+2NaSiO3+3H2O=2NaOAl2O3·2SiO2·H2O↓+4NaOH
PH=9~10 (2)；
H2SO4+2NaAl(OH)4=Na2SO4+2Al(OH)3↓+2H2O
PH=8.0~8.6 (3)；
Step (1) is described to be also handled as follows containing vanadium solution：The pH containing vanadium solution is adjusted, is extracted with primary amine extraction system
It takes, is stripped and crystallizes the upper liquid for obtaining high-purity ammonium metavanadate, while being crystallized, Al is remained in the upper liquid3+：3~7g/
L, also V5+：1~4g/L.
Preferably, the upper liquid is used to prepare ammonium sulfate, the ammonium sulfate be used for described in step (2)
Aluminum sulfate solution is mixed with alum.
Preferably, the step of upper liquid prepares ammonium sulfate include：After upper liquid is removed remaining vanadium, pass through
Heat exchanger be sent into steam stripping ammonia-removing tower in, the pH value of the upper liquid after removing vanadium is adjusted to 11~12 with liquid caustic soda, such as 11.2,11.5,
11.8 or 11.9 etc., by the way that steam heating is except the upper liquid after vanadium in steam stripping ammonia-removing tower, through stripping deamination reaction, except upper after vanadium
Ammonium root and hydroxyl generate ammonia in layer liquid, ammonia from the discharge of the tower top of the steam stripping ammonia-removing tower subsequently enter ammonia absorption tower with
25%~35% dilute sulfuric acid (such as 26%, 27%, 28%, 29%, 30%, 32% or 34%) reaction generates a concentration of 330-
430g/L, such as 335g/L, 340g/L, 345g/L, 350g/L, 360g/L, 380g/L, 390g/L, 400g/L, 410g/L, 420g/
The ammonium sulfate that L or 425g/L etc., pH≤2.5, such as pH value are 2.3,2.1,2.0,1.9,1.5,1.3,1.0 or 0.5.
It is (pure that the ammonium sulfate prepared using upper liquid with the aluminum sulfate solution in step (2) is mixed with alum
About 99%), effect is more preferable, such as needs being recrystallized to alum for high-purity for degree.
Include the following steps as a preferred technical solution, from the method for preparing high-purity ammonium metavanadate containing vanadium leachate：
(1) aluminum sulfate is mixed under conditions of pH is 9~10 to remove silicon with containing vanadium leachate, obtains removing silicon liquid, it
It adjusts afterwards and removes the pH value of silicon liquid as 8.0~8.6 except the aluminium in removal silicon liquid, to be separated by solid-liquid separation, obtain containing vanadium solution and except silicon gives up
Slag；
(2) 1 will be leached under conditions of temperature is 20~80 DEG C except the sulfuric acid of silicon waste residue use quality score >=92.5%
~5h, wherein the concentrated sulfuric acid is 1~4 with the liquid-solid ratio except silicon waste residue:1, leach terminate acid concentration be 2.5~3.8g/L, after pass through
First is separated by solid-liquid separation, and obtains pickle liquor；By the pickle liquor after secondary filter, white residue and aluminum sulfate solution, the sulphur are obtained
Al in sour aluminum solutions3+A concentration of 1.20~1.3mol/L；By the aluminum sulfate solution and a concentration of 330-430g/L, pH≤
2.5 ammonium sulfate mixes, the NH in ammonium sulfate4 +With the Al in aluminum sulfate solution3+Molar ratio be 1.2~1.5:
1, the pH value for adjusting mixed liquor is 1~3,0~20 DEG C of crystallization is cooled to after being reacted under the conditions of 30~70 DEG C, through the second solid-liquid
Isolated ammonium aluminum sulfate crystal and crystalline mother solution, the crystalline mother solution return to step (1) are partly or entirely described for substituting
Aluminium salt is mixed with containing vanadium leachate to remove silicon, and the aluminium in the crystalline mother solution is with the molar ratio containing the silicon in vanadium leachate
0.8~1.2:1；
(3) pH containing vanadium solution is adjusted, is extracted with primary amine extraction system, is stripped and crystallizes to obtain high-purity metavanadic acid
Ammonium, it is described to crystallize while obtaining upper liquid；After upper liquid is removed remaining vanadium, it is sent into steam stripping ammonia-removing tower by heat exchanger,
The pH value of the upper liquid after removing vanadium is adjusted to 11~12 with liquid caustic soda, by steam heating in steam stripping ammonia-removing tower except the upper layer after vanadium
Liquid, through stripping deamination reaction, except ammonium root and hydroxyl generate ammonia in the upper liquid after vanadium, ammonia is from the steam stripping ammonia-removing tower
Tower top discharge subsequently enters ammonia absorption tower and reacts a concentration of 330-430g/L of generation, pH≤2.5 with 25%~35% dilute sulfuric acid
Ammonium sulfate, the ammonium sulfate be used for alternative steps (2) in ammonium sulfate.
Numberical range of the present invention includes not only enumerated point value, further includes the above-mentioned numerical value not included
Arbitrary point value between range, as space is limited and for concise consideration, range includes described in the present invention no longer exclusive list
Specific point value.
Compared with prior art, beneficial effects of the present invention are：
Preparation method provided by the invention containing vanadium solution solves the problems, such as except silicon residue contamination environment, can by its into
Row recycling, obtains the higher alum product of added value, and obtained white residue can be used for preparing refractory brick；It simultaneously can
The consumption for reducing aluminium salt continuously and stably prepares high-purity and contains vanadium solution, to prepare high-purity ammonium metavanadate, and then obtains
Purity is not less than 99.9% high purity vanadic anhydride product, and improve vanadium the rate of recovery (rate of recovery of vanadium can improve 2%~
5%)；
Ammonia solution recycles in preparation method provided by the invention containing vanadium solution, can reach the mesh of clean manufacturing
, while the ammonium sulfate that is prepared of ammonia solution reacts with aluminum sulfate solution and prepares ammonium aluminum sulfate crystal, can make high-purity
The purity of ammonium metavanadate is further promoted (sial purity drops to≤0.005% by 0.05%)；
Preparation method simple process and low cost provided by the invention containing vanadium solution, energy consumption are few.
Description of the drawings
Fig. 1 be one embodiment of the present invention provide from the technological process for preparing high-purity ammonium metavanadate containing vanadium leachate
Figure.
Specific implementation mode
Technical solution to further illustrate the present invention below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, for one embodiment of the present invention provide from the work for preparing high-purity ammonium metavanadate containing vanadium leachate
Skill flow chart, the technique include the following steps：
(1) aluminum sulfate is mixed under conditions of pH is 9~10 to remove silicon with infusion solution containing vanadium, obtains removing silicon liquid,
It adjusts later and removes the pH value of silicon liquid as 8.0~8.6 except the aluminium in removal silicon liquid, to be separated by solid-liquid separation, obtain containing vanadium solution and except silicon
Waste residue；
(2) 1 will be leached under conditions of temperature is 20~80 DEG C except the sulfuric acid of silicon waste residue use quality score >=92.5%
~5h, wherein the concentrated sulfuric acid is 1~4 with the liquid-solid ratio except silicon waste residue:1, leach terminate acid concentration be 2.5~3.8g/L, after pass through
First is separated by solid-liquid separation, and obtains pickle liquor；By the pickle liquor after secondary filter, white residue and aluminum sulfate solution, the sulphur are obtained
Al in sour aluminum solutions3+A concentration of 1.20~1.3mol/L；By the aluminum sulfate solution and a concentration of 330-430g/L, pH≤
2.5 ammonium sulfate mixes, the NH in ammonium sulfate4 +With the Al in aluminum sulfate solution3+Molar ratio be 1.2~1.5:
1, the pH value for adjusting mixed liquor is 1~3,0~20 DEG C of crystallization is cooled to after being reacted under the conditions of 30~70 DEG C, through the second solid-liquid
Isolated ammonium aluminum sulfate crystal and crystalline mother solution, the crystalline mother solution return to step (1) is for substituting part or all of aluminium salt
It being mixed with containing vanadium leachate to remove silicon, the aluminium in the crystalline mother solution and the molar ratio containing the silicon in vanadium leachate be 0.8~
1.2:1；
(3) pH containing vanadium solution is adjusted, is extracted with primary amine extraction system, is stripped and crystallizes to obtain high-purity metavanadic acid
Ammonium, it is described to crystallize while obtaining upper liquid；After upper liquid is removed remaining vanadium, it is sent into steam stripping ammonia-removing tower by heat exchanger,
The pH value of the upper liquid after removing vanadium is adjusted to 11~12 with liquid caustic soda, by steam heating in steam stripping ammonia-removing tower except the upper layer after vanadium
Liquid, through stripping deamination reaction, except ammonium root and hydroxyl generate ammonia in the upper liquid after vanadium, ammonia is from the steam stripping ammonia-removing tower
Tower top discharge subsequently enters ammonia absorption tower and reacts a concentration of 330-430g/L of generation, pH≤2.5 with 25%~35% dilute sulfuric acid
Ammonium sulfate, the ammonium sulfate be used for alternative steps (2) in ammonium sulfate.
Embodiment 1
A kind of preparation method containing vanadium solution, includes the following steps：
It weighs and removes silicon waste residue 1.5t (moisture 35%), 98% sulfuric acid, liquid-solid ratio 2.6 is added:1 pulp, temperature 60 C, control
It is filtered through plate and frame filter press after reaction terminating acid concentration 3.2g/L, leaching time 2h, filter residue can transport refractory factory life to
Produce clay brick.Pickle liquor after macromolecule PE microporous pipe depth-type filtrations, is added and recycles in high-purity ammonium metavanadate crystallization upper liquid again
Ammonia nitrogen prepare ammonium sulfate (NH4)2SO4, pH 2.5, a concentration of 330g/L, NH when reaction4 +：Al3+(molar ratio)=
1.2:1, pH=1.5, temperature 60 C is stirred for being cooled to 15 DEG C, is detached and is washed using centrifuge, and is dried to obtain NH4Al
(SO4)2·12H2O.Al is remained in mother liquor3+：3.8g/L, V5+：Crystalline mother solution can be returned containing in vanadium leachate, be used by 2.6g/L
Al3+Continue to remove silicon, additive amount is aluminium silicon mol ratio 0.8:1, aluminum sulfate is added when insufficient, controls pH=10, then adjusted with sulfuric acid
PH=8.4 removings make containing remaining aluminium in vanadium solution containing Si≤0.005g/L, Al≤0.005g/L in vanadium solution.
Embodiment 2
A kind of preparation method containing vanadium solution, includes the following steps：
It weighs and removes silicon waste residue 1.5t (moisture 35%), 98% sulfuric acid, liquid-solid ratio 3 is added:1 pulp, temperature 60 C, control are anti-
Acid concentration 2.8g/L should be terminated, is filtered through plate and frame filter press after leaching time 2h, filter residue can transport refractory factory production to
Clay brick.Pickle liquor after macromolecule PE microporous pipe depth-type filtrations, is added and recycles in high-purity ammonium metavanadate crystallization upper liquid again
Ammonia nitrogen prepares ammonium sulfate (NH4)2SO4, pH 1.5, a concentration of 366g/L, reaction controlling NH4 +：Al3+(molar ratio)=
1.24:1, pH=2,65 DEG C of temperature is stirred for being cooled to 12 DEG C, is detached and is washed using centrifuge, and is dried to obtain NH4Al
(SO4)2·12H2O.Al is remained in crystalline mother solution3+：4.5g/L, V5+：Crystalline mother solution can be returned and contain vanadium leachate by 3.2g/L
In, use Al3+Continue to remove silicon, additive amount is aluminium silicon mol ratio 0.85:1, aluminium chloride is added when insufficient, controls pH=10, then use sulphur
Acid for adjusting pH=8.2 are removed containing remaining aluminium in vanadium solution, are made containing Si≤0.003g/L, Al≤0.003g/L in vanadium solution.
Embodiment 3
A kind of preparation method containing vanadium solution, includes the following steps：
It weighs and removes silicon waste residue 1.5t (moisture 35%), liquid-solid ratio 3.2:98% sulfuric acid, temperature 60 C, control is added in 1 pulp
It is filtered through plate and frame filter press after reaction terminating acid concentration 3.8g/L, leaching time 2h, filter residue can transport refractory factory life to
Produce clay brick.Pickle liquor after macromolecule PE microporous pipe depth-type filtrations, is added and recycles in high-purity ammonium metavanadate crystallization upper liquid again
Ammonia nitrogen prepare ammonium sulfate (NH4)2SO4, pH 1.0, a concentration of 360g/L, reaction controlling NH4 +：Al3+(molar ratio)=
1.26:1, pH=2,55 DEG C of temperature is stirred for being cooled to 15 DEG C, is detached and is washed using centrifuge, and is dried to obtain NH4Al
(SO4)2·12H2O.Al is remained in crystalline mother solution3+：4.5g/L, V5+：Crystalline mother solution can be returned and contain vanadium leachate by 3.4g/L
In, use Al3+Continue to remove silicon, additive amount is aluminium silicon mol ratio 0.88:1, sodium aluminate is added when insufficient, controls pH=10, then use sulphur
Acid for adjusting pH=8.0 are removed containing remaining aluminium in vanadium solution, are made containing Si≤0.002g/L, Al≤0.002g/L in vanadium solution.
The results are shown in Table 1 for alum sampling analysis in 1~embodiment of embodiment 3：
Table 1
As can be seen from Table 1：Alum content >=99%, Fe≤0.01% that Examples 1 to 3 obtains, heavy metal Pb
≤ 0.001%, water-insoluble≤0.05%, impurity content is less than the impurity content that HG/T2565-2007 is required, if you need to obtain more
The alum of high-purity can be recrystallized.
Embodiment 4
A kind of preparation method containing vanadium solution, includes the following steps：
It weighs and removes silicon waste residue 1.5t (moisture 35%), liquid-solid ratio 3:98% sulfuric acid is added in 1 pulp, and 80 DEG C of temperature, control is instead
Acid concentration 2.5g/L should be terminated, is filtered through plate and frame filter press after leaching time 2h, filter residue can transport refractory factory production to
Clay brick.Pickle liquor after macromolecule PE microporous pipe depth-type filtrations, is added and recycles in high-purity ammonium metavanadate crystallization upper liquid again
Ammonia nitrogen prepares ammonium sulfate, (NH4)2SO4：360g/L, reaction controlling NH4 +：Al3+(molar ratio)=1.3:1, pH=1, temperature
It 30 DEG C, is stirred for being cooled to 0 DEG C, is detached and washed using centrifuge, and be dried to obtain NH4Al(SO4)2·12H2O.Crystallization is female
Al is remained in liquid3+：4.5g/L, V5+：Crystalline mother solution can be returned containing in vanadium leachate, use Al by 3.5g/L3+Continue to remove silicon, addition
Amount is aluminium silicon mol ratio 1.2:1, sodium aluminate is added when insufficient, controls pH=10, then molten containing vanadium with sulfuric acid adjusting pH=8.4 removings
Remaining aluminium in liquid makes containing Si≤0.002g/L, Al≤0.002g/L in vanadium solution.
Embodiment 5
A kind of preparation method containing vanadium solution, includes the following steps：
It weighs and removes silicon waste residue 1.5t (moisture 35%), liquid-solid ratio 2.6:1 (liquid-solid ratio is 3:1 or so) pulp is added 98%
Sulfuric acid, 20 DEG C of temperature control reaction terminating acid concentration 3.0g/L, are filtered through plate and frame filter press after leaching time 1h, filter residue
Refractory factory production clay brick can be transported to.After macromolecule PE microporous pipe depth-type filtrations, it is high-purity partially that recycling is added again in pickle liquor
Ammonia nitrogen in vanadic acid crystalline ammonium upper liquid prepares ammonium sulfate, (NH4)2SO4：430g/L, reaction controlling NH4 +：Al3+(mole
Than)=1.28:1, pH=3, temperature 70 C is stirred for being cooled to 20 DEG C, is detached and is washed using centrifuge, and is dried to obtain
NH4Al(SO4)2·12H2O.Al is remained in crystalline mother solution3+：4.5g/L, V5+：Crystalline mother solution can be returned and be leached containing vanadium by 3.8g/L
In liquid, Al is used3+Continue to remove silicon, additive amount is aluminium silicon mol ratio 1.1:1, sodium aluminate is added when insufficient, controls pH=10, then use sulphur
Acid for adjusting pH=8.3 are removed containing remaining aluminium in vanadium solution, are made containing Si≤0.002g/L, Al≤0.002g/L in vanadium solution.
Embodiment 6
A kind of preparation method containing vanadium solution, includes the following steps：
It weighs and removes silicon waste residue 1.5t (moisture 35%), liquid-solid ratio 1:98% sulfuric acid is added in 1 pulp, and 80 DEG C of temperature, control is instead
Acid concentration 2.5g/L should be terminated, is filtered through plate and frame filter press after leaching time 5h, filter residue can transport refractory factory production to
Clay brick.Pickle liquor after macromolecule PE microporous pipe depth-type filtrations, is added and recycles in high-purity ammonium metavanadate crystallization upper liquid again
Ammonia nitrogen prepares ammonium sulfate, (NH4)2SO4：360g/L, reaction controlling NH4 +：Al3+(molar ratio)=1.5:1, pH=1, temperature
It 30 DEG C, is stirred for being cooled to 0 DEG C, is detached and washed using centrifuge, and be dried to obtain NH4Al(SO4)2·12H2O.Crystallization is female
Al is remained in liquid3+：4.5g/L, V5+：Crystalline mother solution can be returned containing in vanadium leachate, use Al by 3.4g/L3+Continue to remove silicon, addition
Amount is aluminium silicon mol ratio 1.2:1, sodium aluminate is added when insufficient, controls pH=10, then molten containing vanadium with sulfuric acid adjusting pH=8.6 removings
Remaining aluminium in liquid makes containing Si≤0.005g/L, Al≤0.004g/L in vanadium solution.
Embodiment 7
A kind of preparation method containing vanadium solution, includes the following steps：
It weighs and removes silicon waste residue 1.5t (moisture 35%), liquid-solid ratio 4:98% sulfuric acid is added in 1 pulp, and 20 DEG C of temperature, control is instead
Acid concentration 3.0g/L should be terminated, is filtered through plate and frame filter press after leaching time 1h, filter residue can transport refractory factory production to
Clay brick.Pickle liquor after macromolecule PE microporous pipe depth-type filtrations, is added and recycles in high-purity ammonium metavanadate crystallization upper liquid again
Ammonia nitrogen prepares ammonium sulfate, (NH4)2SO4：430g/L, reaction controlling NH4 +：Al3+(molar ratio)=1.42:1, pH=3, temperature
70 DEG C of degree, is stirred for being cooled to 20 DEG C, is detached and is washed using centrifuge, and is dried to obtain NH4Al(SO4)2·12H2O.Crystallization
Al is remained in mother liquor3+：4.5g/L, V5+：Crystalline mother solution can be returned containing in vanadium leachate, use Al by 3.4g/L3+Continue to remove silicon, add
Dosage is aluminium silicon mol ratio 1.1:1, sodium aluminate is added when insufficient, controls pH=10, then adjust pH=8.3 removings with sulfuric acid and contain vanadium
Remaining aluminium in solution makes containing Si≤0.005g/L, Al≤0.005g/L in vanadium solution.
Silicon waste residue described in above example obtains removing silicon liquid by mixing aluminium salt to remove silicon with containing vanadium and chromium silicon solution,
The pH value except silicon liquid is adjusted later except the aluminium in removal silicon liquid, to be separated by solid-liquid separation, and is obtained containing vanadium solution and is removed silicon waste residue；It is described to contain
Vanadium chrome-silicon solution is by by vanadium slag ball milling, carrying out sodium roasting, then by product of roasting water logging, separation of solid and liquid obtains after magnetic separation.
The upper liquid that ammonium metavanadate described in above example crystallizes is prepared via a method which to obtain：Described it will contain vanadium solution
PH is adjusted, is extracted with primary amine extraction system, is stripped and crystallizes the upper liquid for obtaining high-purity ammonium metavanadate, while being crystallized.
Embodiment described above 1-7 is relative to the ammonium sulfate and aluminum sulfate prepared using ammonium metavanadate crystallization upper liquid
Solution reaction prepares alum, and the disposing mother liquor of alum crystallization is compared for removing containing the aluminium in vanadium leachate
In directly being removed containing the aluminium in vanadium leachate using commercially available ammonium sulfate, the obtained rate of recovery containing vanadium in vanadium solution improves
2%~5%.
In addition, alum content >=99%, Fe≤0.01% that embodiment 4~7 obtains, heavy metal Pb≤0.001%,
Water-insoluble≤0.05%, impurity content is less than the impurity content that HG/T2565-2007 is required, if you need to obtain the sulphur of higher purity
Sour aluminium ammonium can be recrystallized.
Applicant states, the foregoing is merely the specific implementation mode of the present invention, but protection scope of the present invention not office
It is limited to this, person of ordinary skill in the field is it will be clearly understood that any belong to those skilled in the art and taken off in the present invention
In the technical scope of dew, the change or replacement that can be readily occurred in are all fallen within protection scope of the present invention and the open scope.
Claims (10)
1. a kind of preparation method containing vanadium solution, which is characterized in that described method includes following steps：
(1) aluminium salt is mixed with containing vanadium leachate to remove silicon, obtains removing silicon liquid, adjust the pH value except silicon liquid later to remove removal
Aluminium in silicon liquid is separated by solid-liquid separation, and is obtained containing vanadium solution and is removed silicon waste residue；
(2) will remove silicon waste residue use sulfuric acid leaching, control leach terminate acid concentration be 2.5~3.8g/L, after through the first solid-liquid
Separation, obtains pickle liquor；By the pickle liquor after secondary filter, white residue and aluminum sulfate solution are obtained；The aluminum sulfate is molten
Liquid is mixed with ammonium sulfate, and the pH value for adjusting mixed liquor is 1~3, crystallisation by cooling again after reaction, is separated by solid-liquid separation and is obtained through second
Ammonium aluminum sulfate crystal and crystalline mother solution, the crystalline mother solution return to step (1) is for substituting part or all of aluminium salt and containing vanadium and chromium
Silicon solution is mixed to remove silicon.
2. the preparation method according to claim 1 containing vanadium solution, which is characterized in that step (1) the amphoteric metal salt
Selected from Al2(SO4)3、AlCl3Or NaAlO2In any one or at least two combination, preferably Al2(SO4)3；
Preferably, step (1) removes silicon under conditions of pH is 9~10.
3. the preparation method according to claim 1 or 2 containing vanadium solution, which is characterized in that step (1) is adjusted except silicon liquid
PH value is 8.0~8.6 to remove except the aluminium impurity introduced in silicon liquid；
Preferably, step (1) adjusts the pH except silicon liquid using sulfuric acid.
4. the preparation method containing vanadium solution according to one of claim 1-3, which is characterized in that step (1) is described to contain vanadium
Chrome-silicon solution is prepared through following method：By vanadium slag ball milling, sodium roasting is carried out after magnetic separation, then by product of roasting water logging, Gu
The isolated containing vanadium and chromium silicon solution of liquid.
5. the preparation method containing vanadium solution according to one of claim 1-4, which is characterized in that step (2) described sulfuric acid
It is 1~4 with the liquid-solid ratio except silicon waste residue:1；
Preferably, mass fraction >=92.5% of step (2) described sulfuric acid；
Preferably, the temperature of step (2) described leaching is 20~80 DEG C；
Preferably, the time of step (2) described leaching is 1~5h；
Preferably, the mode that step (2) described first is separated by solid-liquid separation is filtered selected from filter press.
6. the preparation method containing vanadium solution according to one of claim 1-5, which is characterized in that step (2) described sulfuric acid
NH in ammonium salt solution4 +With the Al in aluminum sulfate solution3+Molar ratio be 1.2~1.5:1；
Preferably, Al in step (2) described aluminum sulfate solution3+A concentration of 1.20~1.3mol/L；
Preferably, a concentration of 330-430g/L of step (2) described ammonium sulfate, pH≤2.5；
Preferably, the temperature that step (2) described ammonium sulfate is reacted with aluminum sulfate solution is 30~70 DEG C；
Preferably, the temperature of step (2) described crystallisation by cooling is 0~20 DEG C；
Preferably, step (2) described secondary filter carries out on macromolecule PE microporous membrane filters and/or accurate filter.
7. the preparation method containing vanadium solution according to one of claim 1-6, which is characterized in that step (2) described crystallization
When mother liquor mixes removal silicon with containing vanadium and chromium silicon solution, the molar ratio of aluminium and the silicon in containing vanadium and chromium silicon in the crystalline mother solution is
0.8~1.2:1.
8. the preparation method containing vanadium solution according to one of claim 1-7, which is characterized in that step (2) described sulfuric acid
Aluminium ammonium is washed and is dried to obtain ammonia-alum product；
Preferably, the solution after the washing is mixed with the crystalline mother solution.
9. the preparation method containing vanadium solution according to one of claim 1-8, which is characterized in that step (1) is described to contain vanadium
Solution is also handled as follows：The pH containing vanadium solution is adjusted, is extracted with primary amine extraction system, is stripped and crystallizes to obtain high-purity inclined vanadium
Sour ammonium, while the upper liquid crystallized；
Preferably, the upper liquid is used to prepare ammonium sulfate, and the ammonium sulfate is used for and sulfuric acid described in step (2)
Aluminum solutions are mixed with alum；
Preferably, the step of upper liquid prepares ammonium sulfate include：After upper liquid is removed remaining vanadium, pass through heat exchange
Device is sent into steam stripping ammonia-removing tower, the pH value of the upper liquid after removing vanadium is adjusted to 11~12 with liquid caustic soda, by steam stripping ammonia-removing tower
Steam heating is except the upper liquid after vanadium, through stripping deamination reaction, except ammonium root generates ammonia, ammonia with hydroxyl in the upper liquid after vanadium
Gas subsequently enters ammonia absorption tower from the discharge of the tower top of the steam stripping ammonia-removing tower and reacts generation concentration with 25%~35% dilute sulfuric acid
For 330-430g/L, the ammonium sulfate of pH≤2.5.
10. the preparation method containing vanadium solution according to one of claim 1-9, which is characterized in that from containing vanadium leachate system
The method of standby high-purity ammonium metavanadate includes the following steps：
(1) aluminum sulfate is mixed under conditions of pH is 9~10 to remove silicon with infusion solution containing vanadium, obtains removing silicon liquid, later
It adjusts and removes the pH value of silicon liquid as 8.0~8.6 except the aluminium in removal silicon liquid, to be separated by solid-liquid separation, obtain containing vanadium solution and except silicon waste residue；
(2) 1~5h will be leached under conditions of temperature is 20~80 DEG C except the sulfuric acid of silicon waste residue use quality score >=92.5%,
Wherein, the concentrated sulfuric acid and the liquid-solid ratio except silicon waste residue are 1~4:1, leach terminate acid concentration be 2.5~3.8g/L, after through first
It is separated by solid-liquid separation, obtains pickle liquor；By the pickle liquor after secondary filter, white residue and aluminum sulfate solution, the aluminum sulfate are obtained
Al in solution3+A concentration of 1.20~1.3mol/L；By the aluminum sulfate solution and a concentration of 330-430g/L, pH≤2.5
Ammonium sulfate mixes, the NH in ammonium sulfate4 +With the Al in aluminum sulfate solution3+Molar ratio be 1.2~1.5:1, it adjusts
The pH value of mixed liquor is 1~3, is cooled to 0~20 DEG C of crystallization after being reacted under the conditions of 30~70 DEG C, is separated by solid-liquid separation through second
To ammonium aluminum sulfate crystal and crystalline mother solution, the crystalline mother solution return to step (1) is for substituting part or all of aluminium salt and containing vanadium
Leachate is mixed to remove silicon, and the aluminium in the crystalline mother solution is 0.8~1.2 with the molar ratio containing the silicon in vanadium leachate:1；
(3) pH containing vanadium solution is adjusted, is extracted with primary amine extraction system, is stripped and crystallizes to obtain high-purity ammonium metavanadate, institute
It states crystallization while obtaining upper liquid；After upper liquid is removed remaining vanadium, it is sent into steam stripping ammonia-removing tower by heat exchanger, uses liquid caustic soda
11~12 will be adjusted to except the pH value of the upper liquid after vanadium, by steam heating in steam stripping ammonia-removing tower except the upper liquid after vanadium, warp
Deamination reaction is stripped, except ammonium root generates ammonia, tower top of the ammonia from the steam stripping ammonia-removing tower with hydroxyl in the upper liquid after vanadium
Discharge subsequently enters ammonia absorption tower and reacts a concentration of 330-430g/L of generation, the sulphur of pH≤2.5 with 25%~35% dilute sulfuric acid
Acid ammonium solution, the ammonium sulfate are used for the ammonium sulfate in alternative steps (2).
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| CN112441621A (en) * | 2020-11-24 | 2021-03-05 | 鄂尔多斯应用技术学院 | Comprehensive utilization method of manganese-rich slag |
| CN113073202A (en) * | 2021-03-19 | 2021-07-06 | 中南大学 | Method for comprehensively treating liquid after vanadium precipitation of acidic ammonium salt in vanadium slag extraction |
| CN114291879A (en) * | 2021-11-23 | 2022-04-08 | 攀钢集团研究院有限公司 | Preparation method of aluminum silicate |
| CN114291879B (en) * | 2021-11-23 | 2023-09-05 | 攀钢集团研究院有限公司 | Preparation method of aluminum silicate |
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